It’s early 1996, and you can’t pick up a tech magazine without seeing the word "Java." Sun Microsystems has promised us the Holy Grail of programming: a language that is completely platform-independent. "Write Once, Run Anywhere" (WORA).
As someone who has spent too many late nights porting C++ code from Windows to Unix and back again, I want to believe.
The Virtual Machine
The secret is the Java Virtual Machine (JVM). Instead of compiling to machine code for a specific CPU, Java compiles to "bytecode." This bytecode runs on the JVM, which is implemented for each platform.
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, Java World!");
}
}
The syntax is intentionally familiar to C++ programmers, but with the "sharp edges" removed. No more manual memory management (hello, Garbage Collection!), no more pointer arithmetic, and a strict object-oriented structure.
Applets: The Killer App?
The real excitement is around "Applets"-small Java programs that run inside a web browser (like Netscape Navigator 2.0). Suddenly, the web isn't just static pages; it's interactive applications. We’re seeing scrolling tickers, simple games, and even real-time stock charts, all running in the browser.
The Reality Check
Of course, it’s not all sunshine. Java is slow. The interpreted bytecode can’t touch the performance of native C++. The Abstract Window Toolkit (AWT) for building GUIs is... let’s say "unrefined." Your app looks slightly different (and often slightly broken) on every platform.
Looking Ahead
Is Java going to replace C++? Probably not for high-performance graphics or system-level code. But for enterprise applications and the "executable web," it has huge potential. If Sun can improve the performance and fix the GUI inconsistencies, we might finally see the end of the platform lock-in.
For now, I’m digging into the JDK and seeing if I can make an applet that doesn't crash my browser.